Misc::change_encoding_mbstring( string $data, string $input, string $output ): string|false

333    protected static function change_encoding_mbstring(string $data, string $input, string $output)334    {335        if ($input === 'windows-949') {336            $input = 'EUC-KR';337        }338        if ($output === 'windows-949') {339            $output = 'EUC-KR';340        }341        if ($input === 'Windows-31J') {342            $input = 'SJIS';343        }344        if ($output === 'Windows-31J') {345            $output = 'SJIS';346        }347 348        // Check that the encoding is supported349        if (!in_array($input, mb_list_encodings())) {350            return false;351        }352 353        if (@mb_convert_encoding("\x80", 'UTF-16BE', $input) === "\x00\x80") {354            return false;355        }356 357        // Let's do some conversion358        if ($return = @mb_convert_encoding($data, $output, $input)) {359            return $return;360        }361 362        return false;363    }